Lock.



Patented Aug. t, i899.

W. B. MCMILLAN. LOCK.

(Application filed June 9, X897.;

(No Rodel.) 2 Sheets-Sheet 1. Fj'y.j.

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H nmmlmumilll [l mill f/ llmmmmlllfll /5 zmliimuiiiil No. 629,808. YPam-mea Aug. l, |399. w. R. MMILLAN.

Lock.

(Applicsftion filed Juvne 189f. (No Medel.) 2 shams-snm 2.

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A iHill!!llmlummuum "l 'QQ/ 7% www UNITED STATES WILLIAM E. MCMILLAN, orSALEM, MIs'soUnI.

PATENT OFFICE.

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sr'norrrcnrrolv forming part of Letters Patent No. 629,808, aerea August1, 189e.

Application filed .Tune 9, 1897.

To a/ZZ whom/ t may concern: l

Be it known that I, WILLIAM R. MCMILLAN,

ofSalem, in the county of Dent and State of Missouri, have inventedcertain new and useful Improvements in Door-Locks; and I do herebydeclare the following to be a full, clear, and eXact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

The invention relates to an improvement in door-locks; and the object ofthe invention is to provide a simple, inexpensive, and durablelatch-and-bolt doorlock without springs and of the class generally knownas gravity-locks and in which the parts are so located relatively toeachother that both the latch and the key bolt can be securely retainedin the locking position by the catch or keeper bearing against the rearend of the lever and both the key-bolt and the latchbolt can be thrownback at the same time byl the key without handling the knob of the door,and at the same time the latch-bolt isV made independent of the key-boltin handling the knob. y y

The construction by which the objects rc1 ferred to are attained will beunderstood fromv the following description and claims, with reference tothe accompanying drawings, in Which- K Figure 1 is a front viewwith thefront covering-plate removefhshowing a lock constructed in accordanceWith the invention.. Fig. 2 is a front view of the latch. Fig. is afront- View of the weighted lever used to operate bygravity thelatch-bolt of the lock. Fig. 4 is a front view of the key-bolt. Fig. 'isa front view of the tumbler of the lock. Fig. 6 is a front view of thehubof the lock that receives the spindle of the knob-handle, and Fig. 7is a front view ot the latch-bolt tumbler. Fig. 8 is avieW similartoFig. 1, showing the lock with the key-bolt omitted.

1 indicates the frame or case of the lock, and 2 a lever having at itsrear end a cylindrical perforation 3 to receive a stud orpin 4,projectingY from the frame andvupon which it is pivoted. The front endof the lever 2is preferably made-thicker at 5 to add to its Weight forfacilitating the dropping of said end by gravity on the key-bolt and itstumbier and is provided with an arm 6, perfo- Serial No. 640,040. (Nomodel.)

rated to receive a pin 7 to connect it with the rear end of thelatch-bolt 8, the front end of which normally projects through the frontedge or dange of the lock-case. Under the lever 2 is placed atumbler 9,having its front end pivoted on the stud 10, projecting from thefrontend of the tumbler `and entering the perforation or slot at 11 in thekey-bolt 1 2. The tumbler 9 also serves as a support for the front endof the lever 2, and the keybolt 12 is placedin front of the tumbler andhas its front end guided in the slot in the edge or iiange of the frame1 and its rear end guided and supported by a stud 13, projecting fromthe frame 1 and received in the slot 14: in the key-bolt. The centralportion of the bolt 12 is arched or V-shaped, the under portion thereofbeing adapted to engage with the lock-key, and the apex of said arch isshouldered at 15 to interlock with alug 16, projecting laterally fromthe top of the tumbler 9. Y Between the Abolt 12 A and the lower portionof the lever 2 is placed a hub 17, which receives the spindles of theknob-handles, and said hub' has its circular ends shouldered, y asusual, -to be received into and guided by the frame and cover of thelock The hub has a laterally-extending finger 18 `adapted to engage withthe under side of a shoulder 19, vformed around the perforation-3 oflthe lever 2 for lifting the said lever and thereby retracting thelatch-bolt Within thev frame. VThe hub 17 is provided with a secondngerl 20, which also acts to raise the weighted lever2, as does thefinger lybutthe latter strikes the shoulder 19 obliqueiy or in aslanting position. In the rear of the upper arm 6 of the lever 2 thereis pivoted to the frame in a recess formed in its edge or iange a catchor keeper 21 in the form of a hinged button, the rear end or arm ofwhich projects outside the frame 1 and constitutes a handle foradjusting it. The forward end or arm is adapted to engage with the rearof the arm 6 to prevent it from swinging rearward, thugs locking thelatchbolt 8.` It will also lock the key-bolt if the latter has its frontend projecting from `the lock and its lug or shoulder '15 in front ofthe forward lugs 1G of the tumbler 9. Vlfhen the catch 21 is out ofengagement with the lever 2, if the key in the lock is turned it IOOwill lift the lever 2 and throw the latch-boltV 8 also rearwardly withinthe lock-case, but instantly the latch-bolt will resume its projectingposition, as before, consequent upon the weighted lever acting thereon.22 indicates a second tumbler operated in connection with thelatch-bolt; It is pivoted at its rear end to the said bolt at 23 and isprovided near one end with a longitudinally-extending slot 24 to receiveand adapt it to slide on a pin at 26 on the lock-frame. The forwardswinging end of this tumbler 22 is provided with a pendent hook 26,which at the end of the outward throw of the latch-bolt and tumbler isadapted to engage a shoulder 27 on the frame-plate and thereby lock thelatchbolt in the position last named. This tumbler 22 is notched orrecessed on its lower face and is adapted to be engaged by thelatch-key, the latch-lever serving to lift it out of engagement with thespur or shoulder 27, the key then acting through said tumbler, and anotch at 28 in the lower face of the latch-bolt serves to unlock thetumbler and force the tumbler and latch-bolt inwardly, overcoming theWeight of the lever 2, which when the pressure of the key is Withdrawnthrows the bolt and tumbler out again in a manner that will be readilyunderstood.

In the vconstruction and arrangement of parts described -it Will be seenthat when the bolts are not lockedout by the keeper 21 the latch-bolt 8can be readily withdrawn independent of the key-bolt and when releasedwill be instantly thrown out again by the action of the Weighted lever.When the keeper 2l is employed, the hook'or catch 26 on the tumbler 22may be omitted, thereby adapting the latch-bolt to be operated either bythe latch-key or by the turning-of the doorknob. Vhen the catch 26 isemployed, the latch-bolt will be operated by the latch-key only, andthen only when not locked out by the keeper 21.

In Fig. 8 the key-bolt is omitted and the lock is made to'depend on thelatch-bolt only-a construction which provides a very simple andinexpensive lock and at the same time an effective one,

In either construction the latch-bolt may be reversed or turned foradaptingit to either a right or left hand lock.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

l. The combination in a door-lock, of a latch-bolt, a weighted leverconnected therewith for actuating it, a key-bolt, a tumbler connectedwith said key-bolt for releasing it and simultaneously lifting theWeighted lever for operating the latch-bolt, substantially as described.

2.' The combination in a door-lock, of a keybolt and a tumbler forengaging and releas; ing said bolt, a latch-bolt, a weighted leverpivotally connected With said latch-bolt and interposed between saidlatch and key bolts and adapted to be actuated by the tumbler of thekey-bolt for actuating the 1atch-bolt, and a tumbler operated inconnection with the latch-bolt and provided with means for locking thesame independently of the means for locking the key-bolt, substantiallyas described.

3. The combination in a lock, of a reversible'latch-bolt, a weightedlever pivotally connected therewith, a key-bolt, a tumbler connectedtherewith for actuating it, said weighted lever resting upon' saidkey-bolt tumblerl to be operated thereby for actuating the latchboltsimultaneously with the movement of the key-bolt, substantially asdescribed.

et. The combination in a lock, of a latchbolt, a Weighted leverpivotally connected therewith, a key-bolt, a tumbler for actuating saidkey-bolt, the Weighted lever resting upon said tumbler and beingactuated thereby for actuating the latch-bolt simultaneously with theoperation of the key-bolt, and a stop for engaging said lever forlocking both the key and latch bolts in their shot positions,substantially as described.

5. The combination in a lock, of a latchbolt, a weighted lever pivotallyconnected therewith for actuating it, the shaft of the door-knobprovided with projections acting upon said weighted lever, the tumblerpivoted to and movingwith thelatch-bolt adapted to engage a projection on the lock-casing for locking the latch-bolt in its shot position, and astop adapted to engage the weighted lever whereby said latch-bolt islocked in shot or operative position for preventing it from beingoperated by means of a latch-key, substantiall.;7 as described.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

WILLIAM R. MCMILLAN.

Witnesses:

THOMAS J. SCOTT, E. M. DURHAM.

IOO

